Minor improvements

ApplicationLibrary/Views/Groups/GroupListView.swift

@@ -18,11 +18,7 @@ public struct GroupListView: View {
                 ScrollView {
                     VStack {
                         ForEach(groups, id: \.hashValue) { it in
-                            GroupView(it, Binding(get: {
-                                groupExpand[it.tag] ?? it.selectable
-                            }, set: { newValue in
-                                groupExpand[it.tag] = newValue
-                            }))
+                            GroupView(it)
                         }
                     }.padding()
                 }
@@ -44,12 +40,12 @@ public struct GroupListView: View {
     private func doReload() {
         if ApplicationLibrary.inPreview {
             groups = [
-                OutboundGroup(tag: "my_group", type: "selector", selected: "server", selectable: true, items: [
+                OutboundGroup(tag: "my_group", type: "selector", selected: "server", selectable: true, isExpand: true, items: [
                     OutboundGroupItem(tag: "server", type: "Shadowsocks", urlTestTime: .now, urlTestDelay: 12),
                     OutboundGroupItem(tag: "server2", type: "WireGuard", urlTestTime: .now, urlTestDelay: 34),
                     OutboundGroupItem(tag: "auto", type: "URLTest", urlTestTime: .now, urlTestDelay: 100),
                 ]),
-                OutboundGroup(tag: "group2", type: "urltest", selected: "client", selectable: true, items:
+                OutboundGroup(tag: "group2", type: "urltest", selected: "client", selectable: true, isExpand: true, items:
                     (0 ..< 234).map { index in
                         OutboundGroupItem(tag: "client\(index)", type: "Shadowsocks", urlTestTime: .now, urlTestDelay: UInt16(100 + index * 10))
                     }),
@@ -105,7 +101,7 @@ public struct GroupListView: View {
                 let goItem = itemIterator.next()!
                 items.append(OutboundGroupItem(tag: goItem.tag, type: goItem.type, urlTestTime: Date(timeIntervalSince1970: Double(goItem.urlTestTime)), urlTestDelay: UInt16(goItem.urlTestDelay)))
             }
-            groups.append(OutboundGroup(tag: goGroup.tag, type: goGroup.type, selected: goGroup.selected, selectable: goGroup.selectable, items: items))
+            groups.append(OutboundGroup(tag: goGroup.tag, type: goGroup.type, selected: goGroup.selected, selectable: goGroup.selectable, isExpand: goGroup.isExpand(), items: items))
         }
         self.groups = groups
         isLoading = false

ApplicationLibrary/Views/Groups/GroupView.swift

@@ -3,13 +3,12 @@ import Library
 import SwiftUI
 
 public struct GroupView: View {
-    @Binding private var expland: Bool
     @State private var group: OutboundGroup
     @State private var geometryWidth: CGFloat = 300
+    @State private var alert: Alert?
 
-    public init(_ group: OutboundGroup, _ expland: Binding<Bool>) {
-        self.group = group
-        _expland = expland
+    public init(_ group: OutboundGroup) {
+        _group = State(initialValue: group)
     }
 
     private var title: some View {
@@ -25,9 +24,12 @@ public struct GroupView: View {
                 .background(Color.gray.opacity(0.5))
                 .cornerRadius(4)
             Button {
-                expland = !expland
+                group.isExpand = !group.isExpand
+                Task.detached {
+                    setGroupExpand()
+                }
             } label: {
-                if expland {
+                if group.isExpand {
                     Image(systemName: "arrow.down.to.line")
                 } else {
                     Image(systemName: "arrow.up.to.line")
@@ -46,12 +48,14 @@ public struct GroupView: View {
             #if os(macOS) || os(tvOS)
             .buttonStyle(.plain)
             #endif
-        }.padding([.top, .bottom], 8)
+        }
+        .alertBinding($alert)
+        .padding([.top, .bottom], 8)
     }
 
     public var body: some View {
         Section {
-            if expland {
+            if group.isExpand {
                 LazyVGrid(columns: Array(repeating: GridItem(.flexible()),
                                          count: explandColumnCount()))
                 {
@@ -123,7 +127,19 @@ public struct GroupView: View {
     }
 
     private func doURLTest() {
-        try? LibboxNewStandaloneCommandClient()!.urlTest(group.tag)
+        do {
+            try LibboxNewStandaloneCommandClient()!.urlTest(group.tag)
+        } catch {
+            alert = Alert(error)
+        }
+    }
+
+    private func setGroupExpand() {
+        do {
+            try LibboxNewStandaloneCommandClient()!.setGroupExpand(group.tag, isExpand: group.isExpand)
+        } catch {
+            alert = Alert(error)
+        }
     }
 }
 

ApplicationLibrary/Views/Groups/OutboundGroup.swift

@@ -7,6 +7,7 @@ public struct OutboundGroup: Codable {
     let type: String
     var selected: String
     let selectable: Bool
+    var isExpand: Bool
     let items: [OutboundGroupItem]
 
     var hashValue: Int {